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Chemistry
Alkenes can be used to make polymers such as poly(ethene) and…
AQAGCSE
8462
Chemistry
For example: In addition polymers the repeating unit has the same atoms as…
AQAGCSE
8462
Chemistry
In addition polymerisation reactions, many small molecules (monomers) join…
AQAGCSE
8462
Chemistry
Students should be able to: recognise addition polymers and monomers from…
AQAGCSE
8462
Chemistry
Alcohols: Alcohols contain the functional group –OH.
AQAGCSE
8462
Chemistry
Aqueous solutions of ethanol are produced when sugar solutions are…
AQAGCSE
8462
Chemistry
Methanol, ethanol, propanol and butanol are the first four members of a…
AQAGCSE
8462
Chemistry
Students should be able to recognise alcohols from their names or from…
AQAGCSE
8462
Chemistry
Students should know the conditions used for fermentation of sugar using…
AQAGCSE
8462
Chemistry
Carat being 100% (pure gold), and 18 carat being 75% gold.
AQAGCSE
8462
Chemistry
Alloys as useful materials: Aluminium alloys are low density.
AQAGCSE
8462
Chemistry
Bronze is an alloy of copper and tin. Brass is an alloy of copper and zinc.
AQAGCSE
8462
Chemistry
Gold used as jewellery is usually an alloy with silver, copper and zinc.
AQAGCSE
8462
Chemistry
Alloys as useful materials: High carbon steel is strong but brittle.
AQAGCSE
8462
Chemistry
Low carbon steel is softer and more easily shaped.
AQAGCSE
8462
Chemistry
Alloys as useful materials: Most metals in everyday use are alloys.
AQAGCSE
8462
Chemistry
Steels are alloys of iron that contain specific amounts of carbon and…
AQAGCSE
8462
Chemistry
Steels containing chromium and nickel (stainless steels) are hard and…
AQAGCSE
8462
Chemistry
Students should be able to: recall a use of each of the alloys specified…
AQAGCSE
8462
Chemistry
Bioleaching uses bacteria to produce leachate solutions that contain metal…
AQAGCSE
8462
Chemistry
Copper ores are becoming scarce and new ways of extracting copper from…
AQAGCSE
8462
Chemistry
For example, copper can be obtained from solutions of copper compounds by…
AQAGCSE
8462
Chemistry
Phytomining uses plants to absorb metal compounds. The plants are…
AQAGCSE
8462
Chemistry
Students should be able to evaluate alternative biological methods of…
AQAGCSE
8462
Chemistry
The Earth’s resources of metal ores are limited.
AQAGCSE
8462
Chemistry
The metal compounds can be processed to obtain the metal.
AQAGCSE
8462
Chemistry
These methods avoid traditional mining methods of digging, moving and…
AQAGCSE
8462
Chemistry
Amino acids have two different functional groups in a molecule.
AQAGCSE
8462
Chemistry
Amino acids react by condensation polymerisation to produce polypeptides.
AQAGCSE
8462
Chemistry
Students should be able to: calculate the masses of substances shown in a…
AQAGCSE
8462
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